update Google Analytics extractor documentation to explain how to set up the Google Analytics API
From @kressaty dogfooding notes:
TODO Jonathan: Got really excited to connect to Google Analytics… and then I realized I had to go create a service account, which sucks. This is because we don’t support Oauth
TODO: Our documentation did not explain how to do this https://www.meltano.com/plugins/extractors/google-analytics.html#install
TODO: Write a tutorial “How To Set Up the Google Analytics API with Google OAuth for Personal Use” and “How To Make a Google Service Account” We have it in the README for the tap, we should put this into the docs and the blog post and its a great piece of content Identify where there are more blog posts per tap
Edited by Danielle Morrill